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Home >> Acura >> 2009 >> CSX Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> PGM-FI System >> DTC Troubleshooting >> DTC P1109: BARO Sensor Circuit Out of Range High

DTC P1109: BARO Sensor Circuit Out of Range High

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
  1. Reset the ECM/PCM with the HDS.
  2. Start the engine.
  3. Check for Temporary DTCs or DTCs with the HDS.

    Is DTC P1109 indicated? 

    YES  -Go to step 4.

    NO  -Intermittent failure, the system is OK at this time.

  4. Update the ECM/PCM if it does not have the latest software (see UPDATING THE ECM/PCM ), or substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ).
  5. Check for Temporary DTCs or DTCs with the HDS.

    Is DTC P1109 indicated? 

    YES  -If the ECM/PCM was updated, substitute a known-good ECM/PCM (see SUBSTITUTING THE ECM/PCM ), then recheck. If the ECM/PCM was substituted, go to step  1.

    NO  -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see ECM/PCM REPLACEMENT  ). If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

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